The Dual 15X scuba diving regulator is simple and lightweight in design making it ideal for a novice scuba diver. 15X First StageThe 15X first stage is compact in design and made with a sandblasted finish making it scratch resistant to maintain both form and function. This first stage features one Dynamic Flow Control (DFC) port and other pre-oriented ports making it suitable for octopus configuration. Dual Second StageThe Dual second stage is made from ultra-lightweight and ultra-strong technopolymer. This second stage features a Vortex Assisted Design (VAD) and a "cved" bypass which allows for unobstructed airflow and consistent natural breathing at any depth. Also, it features a large, user-friendly purge button for easy use, even while wearing thick gloves. Material: Ultralight Technopolymer Finish: Sandblasted First stage: Balanced Diaphragm First stage weight INT: 772 g / 27.2 oz Second stage weight: 183 g / 6.4 oz Total weight (g) INT: 1085 g / 70 oz High pressure ports: 2 HP 7/16" UNF Ports Low pressure ports: 4 LP 3/8" UNF Ports Hose type: Superflex Hose Hose length: 75 cm